Piracy reduction method for digital content

Abstract

An improvement for television channel distribution having digitized-compressed content. The digitized-compressed content are security encoded with a first Gold-code signal. A code-adjust signal and a header are multiplexed to the encoded-digitize-compressed content, to generate a packetized-compressed-video signal. At a set-top box, the header and the code-adjust signal are read from the packetized-compressed-video signal. From the code-adjust signal read from the packetized-compressed-video signal, a second Gold-code signal is generated at the set-top box, synchronized from the code-adjust signal. The encoded-digitized-compressed content are decoded with the second Gold-code signal, thereby generating digitized-compressed content. The digitized-compressed content is decompressed as content.

I claim:  
     
         1 . An improvement to a television channel distribution system having digitized-compressed content, comprising: 
 a first Gold-code generator, for generating a first Gold-code sequence signal;    a security encoder/encrypter for encrypting the digitized-compressed content with the first Gold-code signal, thereby generating encoded-digitized-compressed content;    a code-adjust sub-system for generating a code-adjust signal for determining the Gold code from the first Gold code generator;    a forward-error-correction (FEC) encoder for FEC encoding the encoded-digitized-compressed content;    a first header subsystem for generating a header with a user address;    a multiplexer for multiplexing the code-adjust signal and the header to the encoded-digitize-compressed content, thereby generating a packetized-compressed-video signal;    a second header subsystem for reading the header from the packetized-compressed-video signal;    a start-of-data subsystem for reading the code-adjust signal from the packetized-compressed-video signal;    a second Gold-code generator, responsive to the code-adjust signal read from the packetized-compressed-video signal, for generating a second Gold-code signal, synchronized from the code-adjust signal;    a FEC decoder for error correction;    a decoder, coupled to the second Gold-code generator, for decoding the encoded-digitized-compressed content with the second Gold-code signal, thereby generating unencrypted, digitized-compressed content; and    a decompressing subsystem for decompressing the digitized-compressed content as content.    
     
     
         2 . An improvement to a television channel distribution method having digitized-compressed content, comprising the steps of: 
 generating a first Gold-code sequence signal;    security encoding the digitized-compressed content with the first Gold-code signal, thereby generating encoded-digitized-compressed content;    generating a code-adjust signal;    forward-error-correction (FEC) encoding the encoded-digitized-compressed content;    generating a header with a user address;    multiplexing the code-adjust signal and the header to the encoded-digitize-compressed content, thereby generating a packetized-compressed-video signal;    reading the header from the packetized-compressed-video signal;    reading the code-adjust signal from the packetized-compressed-video signal;    generating, in response to the code-adjust signal read from the packetized-compressed-video signal, a second Gold-code signal, synchronized from the code-adjust signal;    FEC decoding the packetized-compressed-video signal;    decoding the encoded-digitized-compressed content with the second Gold-code signal, thereby generating digitized-compressed content; and    decompressing the digitized-compressed content as content.    
     
     
         3 . An improvement to a television channel distribution system having digitized-compressed content, comprising: 
 a first Gold-code generator, for generating a first Gold-code sequence signal;    a security encoder/encrypter for encrypting the digitized-compressed content with the first Gold-code signal, thereby generating encoded-digitized-compressed content;    a code-adjust sub-system for generating a code-adjust signal for determining the Gold code from the first Gold code generator;    a start-of-data subsystem for reading the code-adjust signal from the packetized-compressed-video signal;    a second Gold-code generator, responsive to the code-adjust signal read from the packetized-compressed-video signal, for generating a second Gold-code signal, synchronized from the code-adjust signal; and    a decoder, coupled to the second Gold-code generator, for decoding the encoded-digitized-compressed content with the second Gold-code signal, thereby generating unencrypted, digitized-compressed content.    
     
     
         4 . An improvement to a television channel distribution method having digitized-compressed content, comprising the steps of: 
 generating a code-adjust signal for determining a first Gold-code signal;    generating, responsive to the code-adjust signal, the first Gold-code sequence signal;    security encoding the digitized-compressed content with the first Gold-code signal, thereby generating encoded-digitized-compressed content;    reading the code-adjust signal from a packetized-compressed-video signal;    generating, in response to the code-adjust signal read from the packetized-compressed-video signal, a second Gold-code signal, synchronized from the code-adjust signal; and    decoding the encoded-digitized-compressed content with the second Gold-code signal, thereby generating digitized-compressed content.    
     
     
         5 . The improvement as set forth in  claim 1 , further including: 
 a memory, located at the RSU, for storing received content;    a time counter, coupled to said memory, for determining a time duration; and    a controller, responsive to the time duration, for erasing the content stored in said memory.    
     
     
         6 . The improvement as set forth in  claim 2 , further including: 
 storing, at the RSU, received content;    determining a time duration; and    erasing, responsive to the time duration, the stored content.    
     
     
         7 . The improvement as set forth in  claim 1 , further including said second header subsystem for reading a synchronization signal from the packetized-compressed-video signal, with the synchronization signal separate from the content.  
     
     
         8 . The improvement as set forth in  claim 2 , further including the step of reading a synchronization signal from the packetized-compressed-video signal, with the synchronization signal separate from the content.  
     
     
         9 . The improvement as set forth in  claim 1 , further including: 
 a memory, located at the RSU, for storing a plurality of received content;    a time counter, coupled to said memory, for determining a plurality of time durations, corresponding to the plurality of received content, respectively; and    a controller, responsive to the plurality time durations, for erasing a respective received content of the plurality of received content when the respective time duration expires.    
     
     
         10 . The improvement as set forth in  claim 2 , further including: 
 storing a plurality of received content;    determining a plurality of time durations, corresponding to the plurality of received content, respectively; and    erasing, responsive to a respective time duration of the plurality of time durations, a respective received content of the plurality of received content when the respective time duration expires.    
     
     
         11 . An improvement to a television channel distribution system having digitized content, comprising: 
 a first Gold-code generator, for generating a first Gold-code sequence signal;    a security encoder/encryptor for encrypting the digitized content with the first Gold-code signal, thereby generating encoded-digitized content;    a code-adjust sub-system for generating a code-adjust signal for determining the Gold code from the first Gold code generator;    a first header subsystem for generating a header with user address;    a multiplexer for multiplexing the code-adjust signal and the header to the encoded-digitize content, thereby generating a packetized-compressed-video signal;    a second header subsystem for reading the header from the packetized-video signal;    a start-of-data subsystem for reading the code-adjust signal from the packetized-video signal;    a second Gold-code generator, responsive to the code-adjust signal read from the packetized-video signal, for generating a second Gold-code signal, synchronized from the code-adjust signal; and    a decoder, coupled to the second Gold-code generator, for decoding the encoded-digitized content with the second Gold-code signal, thereby generating unencrypted, digitized-compressed content.    
     
     
         12 . An improvement to a television channel distribution method having digitized content, comprising the steps of: 
 generating a first Gold-code sequence signal;    security encoding the digitized content with the first Gold-code signal, thereby generating encoded-digitized content;    generating a code-adjust signal;    generating a header with a user address;    multiplexing the code-adjust signal and the header to the encoded-digitized content, thereby generating a packetized-video signal;    reading the header from the packetized-video signal;    reading the code-adjust signal from the packetized-compressed-video signal;    generating, in response to the code-adjust signal read from the packetized-video signal, a second Gold-code signal, synchronized from the code-adjust signal; and    decoding the encoded-digitized content with the second Gold-code signal, thereby generating digitized content.    
     
     
         13 . The improvement as set forth in  claim 1  or  11 , with the code-adjust sub-system for generating a code-adjust signal unique for a RSU of a plurality of RSUs, for determining the Gold code, corresponding to the unique RSU, from the first Gold code generator.  
     
     
         14 . The improvement as set forth in  claim 2  or  12 , with the step of generating a code-adjust signal including the step of generating a code-adjust signal unique for a RSU of a plurality of RSUs, for determining the Gold code, corresponding to the unique RSU, from the first Gold code generator.  
     
     
         15 . The improvement as set forth in  claim 1  or  11 , with a television including the second Gold-code generator and the decoder.  
     
     
         16 . The improvement as set forth in  claim 2  or  12 , with the steps of generating the second Gold-code signal and decoding including the steps of: 
 generating, inside a television, the second Gold-code signal; and  
 decoding, inside the televison, with the second Gold-code signal.  
 
     
     
         17 . The improvement as set forth in  claim 1  or  11 , further including said second header subsystem for reading a synchronization signal and RGB signals from the depacketized-decompressed-video signal, with the synchronization signal and RGB signals separate from each other.  
     
     
         18 . The improvement as set forth in  claim 2  or  12 , further including the step of reading a synchronization signal and RGB signals from the packetized-compressed-video signal, with the synchronization signal and RGB signals separate from each other.  
     
     
         19 . The improvement as set forth in  claim 16 , further including said second header subsystem for reading a synchronization signal and RGB signals from the depacketized-decompressed-video signal, with the synchronization signal and RGB signals separate from each other.